Chapter 87: Try searching
March 12, 2011
Zhou Ning quickly came to the second floor of the Criminal Police Team. Just as he walked to the forensic room, he heard a noise next door. He was slightly surprised and glanced at the time on his watch. It was only 7:30. Could it be that these people had come early in the morning?
Standing on tiptoe and looking through the window on the door, I saw that many people were busy inside.
Zhou Ning shook his head, thinking that these were all crazy technical people. He quickly returned to the office, turned on his computer and logged into his email directly. He was anxious to know the test results. After all, no test report was given yesterday and Xu Dayuan had a quarrel with the testing center.
Fortunately, there were three unread emails in the mailbox, and Zhou Ning quickly clicked to receive them.
He ignored everything else and went straight to the test of the vaginal extract. No rice seeds were found, only a variety of oils. Component analysis showed that it was a common ingredient in the surface application of elves. However, a DNA sample that did not belong to the deceased was extracted from the body fluids.
And below this DNA sample, there is a line of red font that reads:
Of particular note, the sex chromosomes of this DNA sample are XXY.
When Zhou Ning saw the red mark, his heartbeat quickened. Such a special DNA, it was too specific.
Zhou Ning quickly looked through the subsequent tests. After all, there was blood on the windshield. He found the last page and found that the remaining blood matched the other DNA found in the body of the deceased. Zhou Ning slammed the table twice.
You guessed it right, really guessed it right. It seems that the murderer found out that the deceased came out alone very suddenly, so he acted on impulse. As for the DNA residues in the deceased's body, it was either from the dandruff and oil on his hands, or from injuries on his hands.
Of course, Zhou Ning was more inclined to the latter. He had a wound on his hand that rubbed against the windshield. When he violated the deceased, he did not pay attention to the wound. After all, 90% of XXY patients are sperm-free.
As he clicked print, the door opened and Liu Yongxin walked in with a gentlemanly step. Da Zhao followed closely behind him. When he saw Zhou Ning with bright eyes, he paused slightly.
"What are you eating so early in the morning? You're so excited. Did you find a nugget of gold?"
Zhou Ning smiled and said:
"Almost. The inspection report is out."
Liu Yongxin quickly walked to the printer and read the report one by one. The boss opened his mouth wide at the end. Da Zhao, who was standing behind Liu Yongxin, also read it and scratched his head with a puzzled look on his face.
"What does XXY chromosome mean?"
Zhou Ning was in a good mood, so he was naturally willing to answer.
"You should have learned in biology class that among sex chromosomes , males are XY and females are XX. People with XXY chromosomes usually show the physiological characteristics of XY males. At the same time, individuals with androgen deficiency may have different degrees of feminine secondary sexual characteristics.
For example, he may look like a male, but he is very short, his Adam's apple is not obvious, his chest does not have pectoralis major muscles but is instead thickened with fat, his testicles and beard are underdeveloped, his reproductive organs may be normal , but he is azoospermic or has dysfunctional sperm.
Tennis player Sarah Gronerd is an XXY hermaphrodite who had her genitals removed at the age of 19 and is now a biological woman. She has since participated in various women's competitions.
Da Zhao opened his mouth wide and couldn't recover from the shock for a long time.
"So, the murderer is a 'traitor'?"
Liu Yongxin paused, not feeling particularly excited, but rather worried.
"This DNA is obviously different from the DNA in the joint investigation notice issued by the Municipal Bureau. Does this mean that this case has nothing to do with the Red Dress Serial Murder Case?"
Zhou Ning nodded. He had thought of this as well.
"I think whether it is an extension of the Red Dress Serial Murder Case has little to do with our investigation of this case. Let's just do our own thing. If there is a connection, or if it overturns the previous investigation of the Municipal Bureau, that's a matter for later. After all, at present, the only common points are the red dress and the cut fingerprints."
Liu Yongxin let out a breath.
"Tell Dr. Lu, aren't they still busy restoring the skulls of the five anonymous people?"
Zhou Ning picked up a printed material and nodded towards Liu Yongxin.
"Let me tell you, Master, you can give this to Master Xu. I think the murderer is so clear about his own symptoms and yet he is so bold to violate the victim. This murderer must have gone for a medical examination. We can start from this aspect."
Liu Yongxin smiled.
"That's exactly what I thought."
Zhou Ning took the report and walked to the next room. When Dr. Lu saw Zhou Ning, he quickly waved his hand.
"Forensic Doctor Zhou, come and take a look. We have made some progress."
Zhou Ning folded the report in his hand and walked to Dr. Lu. He said, "He is here to help you. No matter what, this enthusiasm cannot be dampened." So he didn't rush to talk about the report.
Dr. Lu pointed at the display screen. This screen was not the size of an ordinary computer. It was a 60-inch LCD screen. Five women's color portraits appeared on it, and next to the portraits there were options for skin color, hairstyle, and iris color .
After a careful look, he found that these five people all had short hair, the same skin color and hair color. However, at a cold glance, these five people seemed to have some similarities. He couldn't say exactly where they were similar, but he felt that they were very similar at a glance.
"We didn't adjust the details. This was synthesized using software, and the data of the facial features were calculated. However, please help me take a look at the hair color and length. This is the file from that time."
As he spoke, Dr. Lu handed Zhou Ning a tablet with some electronic files and documents on it. Zhou Ning placed the report on the table and began to look through it one by one.
The photos taken at the scene are very clear, but don't expect the skin color of the decomposed corpse to be that rapidly purple-black color. There are multiple abuse injuries on the face, and the iris is no longer distinguishable. After all, the cornea starts to become cloudy if the person has been dead for more than 24 hours, and becomes completely opaque if the person has been dead for more than 48 hours.
Zhou Ning narrowed his eyes and stared at the composite image of five people for a long time. Xiao Qu came over and handed the control handle to Zhou Ning. The hairstyle, skin color and iris color last time were chosen by Zhou Ning. He felt that Zhou Ning's judgment in this regard was more convincing.
"Medicine Zhou, you can make adjustments."
Zhou Ning did not refuse. He took the control arm and stared at the first restored image. He thought of Cheng Chunyan's facial features in his mind, changed her hair to chestnut brown and her hairstyle to long curly hair. Then he adjusted her skin color to a whiter color and changed her irises to dark brown. After all, most yellow people have this color.
After the adjustment was completed, click Apply, and the restoration image No. 1 was completely changed. Dr. Lu supported his chin with one hand and stared at the restoration image.
"Why do I feel that this victim is a bit like the Cheng Chunyan who was reconstructed earlier?"
Zhou Ning nodded.
"These people all have something in common. Their eyebrows and eyes are far apart, their pupils are far apart, their lips are thin, their zygomatic arches are not obvious, and their jaws are slightly protruding. I don't know if you have photos of the six victims with identities. I hope you have some so I can compare them."
Dr. Lu suddenly realized and quickly went to look for it on the computer. Zhou Ning did not stop his actions and quickly changed the remaining four restoration images one by one. Except for the hairstyle, he selected the same parameters as the first restoration image.
At this time, more and more people gathered around the display screen. Everyone stared at the restored picture and kept talking about their ideas. Xiaoqu moved closer.
"This one can also display makeup, but I don't have many types of input."
Zhou Ning smiled and shook his head. He didn't know anything about makeup, but adjusting himself to this state was enough to search in the household registration system.
Before he could say anything, Dr. Lu came over excitedly, holding a laptop and showing it to Zhou Ning.
"Forensic Doctor Zhou, look, these are photos of the six victims. Now that you've mentioned this, I've realized that these six girls, although younger and still in school, all have big, wavy hair and have dyed it."
Zhou Ning took it and looked at it carefully. There were two photos on each page, one was the victim's ID photo, and the other was a photo of the scene. One could clearly see the dividing line of the deceased's dyed hair, as well as the curling of his long hair.
"I just read the investigative reports of the five victims, and the estimated height of the deceased was about 160 cm and weight was 80-90 catties. It seems that the murderer has a special preference for chestnut brown curly hair and thin women."
Zhou Ning paused, then continued:
"Dr. Lu, the autopsy report on our case is out. A special DNA was found in the body and windshield of the deceased, but it has nothing to do with what was announced in the city bureau's cooperation order. Perhaps this is not the twelfth Red Dress Serial Murder Case."
Dr. Lu waved his hand.
"Don't be stuck with these rules and regulations. We are scientific researchers and we need to see solid results. We are not trying to find fault with the Municipal Bureau. Just treat it as an experiment. Let's quickly search the restored images of these five people in the household registration system and try!"
